sudo-discuss

sudo-discuss@sudoroom.org

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7432 discussions

Interest in volunteering for Oakland Creek to Bay Day, Sept 17?

by Patrik D'haeseleer

A great opportunity to get out in nature, do something for the environment, help make our community a better place to live, and *be very publicly seen as a force for Good in our neighborhood*! The 21st Annual Oakland Creek to Bay Day <http://www2.oaklandnet.com/Government/o/PWA/o/FE/s/ID/OAK024743> is coming up Saturday, September 17. But *if we want to register as a volunteer group, and propose a specific site to work on, we need to register TODAY <https://docs.google.com/forms/d/e/1FAIpQLScxmJHcUrUPLEyXjs1HKtX7M__XE1hYO8q…>.* *Speak up asap if you'd like to participate, if you have any ideas for a site to work on (here's the existing list so far <http://www2.oaklandnet.com/Government/o/PWA/o/FE/s/ID/OAK024743#locations>; we can propose more), and especially if you can help as volunteer (co-)coordinator! *I would love to participate, but September is looking to be a busy month for me, so I'd prefer not to be the sole volunteer coordinator Patrik

9 years, 3 months

let's sell the JUKI sewing machine on Craigslist

by Jake

http://spaz.org/~jake/pix/2016-08/IMG_20160820_162846.jpg http://spaz.org/~jake/pix/2016-08/IMG_20160820_162855.jpg http://spaz.org/~jake/pix/2016-08/IMG_20160820_162901.jpg http://spaz.org/~jake/pix/2016-08/IMG_20160820_162907.jpg I want to put this on craigslist, table and all. I think Sudoroom does better with individual small sewing machines which can be maintained and moved more easily than these large industrial behemoths that don't work. If there are any objections please raise them now, otherwise I will put this thing on craigslist for $500 and negotiate to get as much of that as I can. Or do you know anyone who is interested, or any listservers we should advertise it on? -jake

9 years, 3 months

Re: [sudo-discuss] multiple lamp dimming with a single arduino

by robb

Dan Fredell's <http://danfredell.com/df/Projects/Entries/2013/1/6_DMX_Dimmer.html> 4 channel design uses a 20mhz clock On Thu, Aug 25, 2016 at 1:01 AM, Jake <jake(a)spaz.org> wrote: > send links along with claims like this > > > On Wed, 24 Aug 2016, robb wrote: > > and >> why do you need a 20MHz crystal? >> apparently you need 20mhz for 4 stable channels when using the timer >> method >> >>

9 years, 3 months

Invoice 1419 from Omni Commons

by Omni Commons

Dear Sudo Room, Here's your invoice! We appreciate your prompt payment. Thanks for stewarding the commons! Omni Oakland ------------------------ Invoice Summary -------------------------- Invoice # : 1419 Invoice Date: 08/25/2016 Due Date: 09/04/2016 Terms: Net 10 Amount Due: $2,446.00 The complete version has been provided as an attachment to this email. ---------------------------------------------------------------------

9 years, 3 months

multiple lamp dimming with a single arduino

by Jake

robb, since we got the zero-crossing detection working, now it's a matter of deciding how many lamps to control with a single arduino. I believe this instructable shows software that doesn't rely on the chip's timer being tied to the triac control pins, meaning that it could be used to control 8 or more triacs with a single plain arduino. http://www.instructables.com/id/3-channel-Dimmerfader-for-Arduino-or-other-… /* AC Light Control Ryan McLaughlin <ryanjmclaughlin(a)gmail.com> with slight modifications */ #include <TimerOne.h> // http://www.arduino.cc/playground/Code/Timer1 #define PINS 3 volatile int pinCount[PINS]; // make volatile to make available in interrupt volatile boolean zero_cross=0; // Boolean to store a "switch" to tell us if we have crossed zero int AC_pins[] = {3,4,5}; // Stup the pin numbers int AC_dim[PINS]; // Holds Dimming levels (0-128) 0 = on, 128 = 0ff int freqStep = 78; // Set the delay for the frequency of power (65 for 60Hz, 78 for 50Hz) per step (using 128 steps) // freqStep may need some adjustment depending on your power the formula // you need to us is (500000/AC_freq)/NumSteps = freqStep void setup() { for(int a=0; a < PINS; a++) { //set the pins to output pinMode(AC_pins[a],OUTPUT); pinCount[a] = 0; // keeps track of the time in the cycle AC_dim[a] = 0; // dimming level set to zero } attachInterrupt(0, zero_cross_detect, FALLING); // Attach Interrupt to Pin 2 (interrupt 0) for Zero Cross Detection Serial.begin(9600); Timer1.initialize(freqStep); // Initialize TimerOne library for the freq we need Timer1.attachInterrupt(dim_check, freqStep); // Use the TimerOne Library to attach an interrupt // to the function we use to check to see if it is // the right time to fire the triac. This function // will now run every freqStep in microseconds. } void zero_cross_detect() { // function to be fired at the zero crossing zero_cross = 1; // set flag to tell dimming function zero cross has occured } // End zero_cross_detect void dim_check() { // Function will fire the triac at the proper time if(zero_cross == 1) { // First check to make sure the zero-cross has happened else do nothing for(int a=0; a < PINS; a++) { if(pinCount[a] >= AC_dim[a]) { // Check and see if i has reached the dimming value we want digitalWrite(AC_pins[a], HIGH); // Fire the Triac delayMicroseconds(5); // Pause briefly to ensure the triac turned on digitalWrite(AC_pins[a], LOW); // Turn off the Triac gate (Triac will turn off at the next zero cross) pinCount[a] = 0; // Reset the accumulator zero_cross = 0; // Reset the zero_cross so it may be turned on again at the next zero_cross_detect } else { pinCount[a]++; // If the dimming value has not been reached, incriment the counter } } } } void loop() { // This is simply making all outputs cycle through bright-dark, out of time with each other. for(int i=0; i<127; i ++) { for(int a=0; a < PINS; a++) { int ii = i+42; //this is the bit that puts the blinking lights out of sync with one another if(ii > 127) ii -= 127; AC_dim[a] = ii; } delay(50); } }

9 years, 3 months

I'm proud of Sudoroom !!

by Romy Ilano

Keep it up! Sent from my iPhone

9 years, 3 months

Membership block of Lone Ranger aka. Xer0Dynamite aka. Dreaming Forward

by Marc Juul

He showed up at the previous Wednesday meeting. I'm blocking this person's membership. He kept talking to us like we were total noobs in running a hackerspace and he was going to tell us all how to fix everything (though not taking on any tasks himself other than his organizational LARP game idea). He kept trying to tell us about how noisebridge is run even after I told him that we're no strangers to noisebridge. After reading some of his tweets I decided I'm just going to tell him he's not welcome at sudo if I see him again. Let me know if anyone feels like that's the wrong thing to do: https://twitter.com/Xer0Dynamite/status/760708825934602240 https://twitter.com/Xer0Dynamite/status/760710581926170624 https://twitter.com/Xer0Dynamite/status/760711635363299329 https://twitter.com/Xer0Dynamite/status/760714063710150656 https://twitter.com/Xer0Dynamite/status/760717666256621569 https://twitter.com/Xer0Dynamite/status/761043131710091264 https://twitter.com/Xer0Dynamite/status/761043565447225344 And his twitter blurb about himself: "...He comes from the future. Fought alone. Abandoned by the world I loved. Silver bullets from the uber-mind. Suicidal without some pussy." Here are his answers to member questions: Why do you want to be a member of sudo room?: The people here are good and want the place to succeed. I can save a well-staffed ship if it's sinking or make it better engineered if it is not. If you know already, what are you excited to do at sudo room?: Start a game that will self-organize the many conversations that happen here. If you know already, what are you excited to share with the sudo room community?: One and the same as above, as the project is a LARP (think Dungeons and Dragons crossed with Treasure Hunt), encouraging everyone to play. Have you ever been banned from another hackerspace? If so, when and why?: No. -- marc/juul

9 years, 3 months

seeking small CRT color TV/video monitor

by Jake

I'm looking for a non-LCD color video screen, somewhere between 5" and 8" diagonal size. I guess 7" would be perfect. I want to use it as the "dashboard" for my electric motorcycle. It will primarily show the view from a rear-facing videocamera, but i'm going to use an arduino to overlay information like speed and battery state onto the picture, videogame style. I look forward to enclosing the back of the CRT in transparent polycarbonate so that the yoke and other features are visible. i might have to use an LCD until i find the right CRT, but i think a CRT would be ideal for reasons of class and style. But it has to be color. if you know of a color CRT monitor in this small size range that's available (for free ideally) please let me know. I am expecting composite signal, but VGA would probably work too if i modified my signal plan. thank you, -jake P.S. if you're interested in an antique vacuum-tube television, make me an offer: http://sfbay.craigslist.org/eby/atq/5739351649.html

9 years, 3 months

wireless mouse found

by robb

hal, i think you may have left your wifi mouse in sudo i'll put it behind taz

9 years, 3 months

do we want to fix some soda dispensers?

by robb

found some on craigslist https://sfbay.craigslist.org/eby/zip/5740427145.html

9 years, 3 months

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